SELECT receiver_id,(
   SELECT json_build_object(key, SUM(value::TEXT::INT))
   FROM json_each(json_object_agg(sender_id, point)) GROUP BY key
) as sended_points
FROM slack_post_reactions AS spr
JOIN reward_logs AS rl ON spr.id = source_id
AND source_type = 'slack_post_reactions'
AND DATE_TRUNC('month', rl.created_at) = DATE_TRUNC('month', CURRENT_DATE)
GROUP BY receiver_id